Never listen to the teachers who condemn other tuition classes, tuition teachers due to personal issues. Some teachers condemn some classes and try to promote their friend's classes .
Always inquire about the class from past students who achieved their goals or other parents who recommend a class.
Select a teacher who does not criticize other classes, teachers and waste the time in the class.
See whether the syllabus is covered by allocating evenly distributed duration's for each unit without doing more units in last few months. Normally, last few months before the examination all 3 subjects work load is there which is unbearable.
Initially slowly going classes seem to be good apparently but in the long run they rush through the units and students may not understand properly
Whether more questions are done in the class regularly in other words more tutorials are done in the class.
Certain students initially go for 2 classes and select the better one. They select mostly the slowly teaching class wrongly, since the students do not consider about the way the syllabus is covered.